Light refraction member, optical system, lighting systems, display systems, moving object, and mold

Abstract

A light refraction member includes an incident surface on which planar light is incident, a plurality of refractors that refract the planar light, and an emitting surface from which the planar light refracted by the plurality of refractors is emitted as emitted light. The plurality of refractors are provided side by side in a first direction on at least one of the incident surface and the emitting surface, and each of the plurality of refractors has an area in which a direction in which the planar light is refracted changes along a second direction intersecting the first direction.

What is claimed is: 
     
       1. A light refraction member applied to a head-up display mounted on a moving object, the head-up display receiving emitted light from the light refraction member and displays an image, the light refraction member comprising:
 an incident surface on which planar light is incident; 
 a plurality of refractors that refract the planar light; and 
 an emitting surface, which faces the incident surface, and from which the planar light refracted by the plurality of refractors is emitted as emitted light, 
 wherein 
 each of the plurality of refractors is a curved lens having a shape recessed with respect to the incident surface, and is provided side by side in a first direction on the incident surface, and 
 each of the plurality of refractors has an area in which a direction in which the planar light is refracted changes along a second direction intersecting the first direction so that a light distribution range on the emitting surface of the emitted light is wider in the first direction in a direction corresponding to an upward direction of the image in the second direction. 
 
     
     
       2. The light refraction member of  claim 1 , wherein
 each of the plurality of refractors is continuous along the second direction. 
 
     
     
       3. The light refraction member of  claim 1 , wherein
 each of the plurality of refractors has a groove extending along the second direction, and 
 a depth of the groove changes linearly along the second direction. 
 
     
     
       4. The light refraction member of  claim 1 , wherein
 each of the plurality of refractors has a groove extending along the second direction, and 
 a depth h of the groove is 0.01 mm≤h≤5 mm. 
 
     
     
       5. The light refraction member of  claim 1 , wherein
 the light refraction member has a negative refractive power with respect to the planar light incident on the incident surface. 
 
     
     
       6. An optical system comprising:
 the light refraction member of  claim 1 ; 
 a light guide member that includes a light source incident surface on which light source light from a light source is incident, and a first surface and a second surface facing each other; 
 a prism that is provided on the first surface and reflects the light source light passing through an inside of the light guide member toward the second surface, and 
 a light controller that is disposed between the light source and the light source incident surface and is integrated with the light guide member, the light controller having a collimating function for bringing the light source light output from the light source closer to parallel light, 
 wherein 
 the light guide member includes a direct optical path in which the light source light incident from the light source incident surface is directly reflected by the prism and is emitted as the planar light from the second surface to the light refraction member. 
 
     
     
       7. The optical system of  claim 6 , wherein
 the light source light is incident on the light source incident surface along the first direction. 
 
     
     
       8. The optical system of  claim 6 , wherein
 the light source light is incident on the light source incident surface along a direction intersecting the first direction. 
 
     
     
       9. A lighting system comprising:
 the optical system of  claim 6 ; and 
 a light source that emits the light source light to the light source incident surface of the light guide member, 
 wherein 
 the light source includes a plurality of solid-state light-emitting elements arranged in the width direction of the light guiding member; 
 the light controller includes a plurality of individual light controllers arranged in the width direction of the light guide member; 
 each of the plurality of solid-state light-emitting elements corresponds one-to-one to each individual light controllers of the light controller; and 
 each of the individual light controllers is integrated with the light guiding member. 
 
     
     
       10. A display system comprising:
 the lighting system of  claim 9 ; and 
 a display device that receives the emitted light and displays an image. 
 
     
     
       11. A moving object comprising:
 the display system of  claim 10 ; and 
 a moving object body that is equipped with the display system.